Plastic prop compared to metal

[Zen]

'm looking at props. At this point I'm just experimenting. I have a tunnel with a OS leg. I was looking at the metal 440 by octura. What is the same side and pitch in aplastic. And I want to get a few different sizes to start. The only prop I have and have been using is a octura x438. Motor runs luke warm with no issues. Can anyone recommend what props I can try for more speed in addition to the x440?

[Fluid]

What motor? What voltage? What controller? Please don't make us guess.......


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[Zen]

11.1 120 swordfish pro.
Motor is a 2290kv lepord 3650

[montymike]

What hull?

[Zen]

Sorry once again. It's a small HK Hornet tunnel.

[iop65]

first : i don't know much about tunnel hulls

but : are you sure it's a 2290Kv 3650 leopard?
it seems a little low on KV for 3s to me

i guess you mean carbon reinforced props when you write "plastic"?

i always take on size higher , due to the flex a carbon prop has ,compared to a metal one

graupner k-series are rather good value for the money

when you confirm on the KV people can give you better advice regarding prop ,it makes a difference if it is a 2290 kv or ( for instance) a 3400 kv on 3s!

[Zen]

Yup 2290kv 6d. This is my first experience with electric F1s. I have 3 gas 1/4 scale gas tunnels. But electrics is a whole new beast to me. I appreciate the concern about the kv and 11.1v confirmation. I'm sure you guys have spent more cash then me in this hobby. But for a project just to see if I like electric, it seems slapping a small boat together isn't cheap. Appreciate the concern, it would suck if I made a wrong decision myself and smoked my system. Nice to see RC boat enthusiasts have each other's back.

[Zen]

Also what size motor watts and kv would you use.

[iop65]

again : not much expieience with tunnel hulls here
but i think the 3650 is about the right size for such a small hull

would think that it needs to be driven on 4s with that 2290Kv,again :there are guy's here that can help you better

but with 3s that motor+esc should have no problem with the 440 octura or 42 mm carbon prop (all 2blade and 1.4 p)
because those carbon props cost almost nothing :start with the 40mm and check the temps before propping up to the 42mm

and off course ;in case you would try 4s : smaller props are needed (that x438 could be spot on) ,esc is still ok

hope that someone with more knowledge about this hull can confirm or correct this?

[Zen]

Thanks appreciate the help.
Just so I am sure. If I use 2. 2s batteries, they are exact duplicates. Same c same amps. Do you run in parallel or series. I will find a diagram how to wire them together.